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US 2012/0232196 A1Published application
Uv-stable polycarbonate composition having improved properties
AssigneeBayer MaterialScience AG
InventorsStephan Konrad, Helmut Werner Heuer, Karl-Heinz Köhler, Rolf Wehrmann, Daniel Koch, Marc Buts, Frank Guldentops
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Abstract
The invention relates to a UV-stabilised melt polycarbonate composition having improved melt flowability while at the same time having good optical properties and at the same time good hydrolytic stability, the composition comprising a melt polycarbonate, at least one UV absorber, at least one phosphine and optionally an aliphatic carboxylic acid ester.
Claims17
-15. (canceled)
A composition comprising a melt polycarbonate and
- a) at least one UV absorber,
- b) at least one phosphine, and
- c) optionally an aliphatic carboxylic acid ester,
- wherein the phosphines comprise compounds of formula (I):
- wherein Ar1 and Ar2 represent identical or different unsubstituted or substituted aryl radicals and R′ represents an unsubstituted or substituted aryl radical or one of the following radicals (Ia) to (Ih)
- in which R represents an unsubstituted or substituted C6-C14-aryl radical and n and m each independently of the other is an integer from 1 to 7, and wherein the hydrogen atoms of radicals (Ia) to (Ic) can also be replaced by substituents, and wherein
- R′ can also be 4-phenyl-phenyl or α-naphthyl when Ar1 and Ar2 in formula (I) are each likewise 4-phenyl-phenyl or α-naphthyl, and wherein the 4-phenyl-phenyl and α-naphthyl radicals can be substituted.
4 more elements
Dependencies are inferred from the claim text.